Add 9/12 and 45/24, Solve 9/12 + 1 21/24 as a fraction

Add 9/12 and 45/24

1^st number: 9/12, 2^nd number: 1 21/24

9/12 + 45/24 is 21/8.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 24 is 24

Next, find the equivalent fraction of both fractional numbers with denominator 24
For the 1st fraction, since 12 × 2 = 24,
9/12 = 9 × 2/12 × 2 = 18/24
Likewise, for the 2nd fraction, since 24 × 1 = 24,
45/24 = 45 × 1/24 × 1 = 45/24
Add the two like fractions:
18/24 + 45/24 = 18 + 45/24 = 63/24
63/24 simplified gives 21/8
So, 9/12 + 45/24 = 21/8
In mixed form: 25/8

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